I just keep on suggesting, but I remember O said at mfg that maybe use cable's viper beam for Spartan...well if you don't use it for him you could give it to evil ryu or akuma to make a cool shinku hadoken for them to make them different

might be cool if possible to have a few tiny puddles form on the ground on batman's stage's roof top and maybe the same for aquaman's stage...I always thought that could add to the believeability of water on stages especially with rain